I do wonder if the world will "re-invent" ekranoplans so to speak. Improvements in engineering design, tooling and material science could make them economically viable in a niche of the global economy. The youtuber Mustard [1] has a great video on the mad ideas of Italian born Soviet engineer Robert Bartini. [1] https://www.youtube.com/watch?v=UD7xiWWs-bs